. >> reporter: the president at the birthplace of romney care, defending obama care. and telling the boston crowd, it will get better. >> i'm not happy about it. there's no excuse for it. and i take full responsibility for making sure it gets fixed asap. >> reporter: while back on capitol hill, before a much more hostile audience at a congressional hearing, the woman in charge of the affordable care act, fell on her sword, with her first full-throated apology. >> let me say directly to these americans. you deserve better. i apologize. hold me accountable. i'm responsible. >> reporter: secretary kathleen sebelius was reluctant to pass the buck, even when pressed. >> i think it's great you're a team player and taking responsibility. it is the president's ultimate responsibility, correct? >> you clearly -- whatever. yes, he is the president. he is responsible. >> reporter: but apologies did little to stop the 3 1/2-hour onslaught of republican criticism wednesday, after a memo surfaced showing the lead contractor, working on the site, warned of numerous problems. >> do y